BeanUtil 反射机制 拷贝对象类或list

BeanUtil为拷贝类，list,map的工具类，类似BeansUtils

package com.gy.util;import java.lang.reflect.Field;import java.lang.reflect.Method;import java.math.BigDecimal;import java.sql.ResultSet;import java.util.*;/** * 此类为重写BeanUtils.copyProperties方法，其他包含List等情况，可以扩展重写 * * @author chenhs * @version 20170728 * */public class BeanUtil {    /**     * @param target  目标类     * @param source  原类     * @param objects 对象集合     */    public static void copyProperties(Object target, Object source, Object... objects) {        try {            Class clazz1 = source.getClass();            Class clazz2 = target.getClass();            Field[] fields1 = clazz1.getDeclaredFields();            Field[] fields2 = clazz2.getDeclaredFields();            for (Field field1 : fields1) {                String name1 = field1.getName();                Method m = clazz1.getMethod("get" + toUpcase(name1));                for (Field field2 : fields2) {                    String name2 = field2.getName();                    if (name1.equals(name2)) {                        field2.setAccessible(true);                        if (m.invoke(source) != null) {                            field2.set(target, m.invoke(source));                        }                    }                    //判断objects                    if (objects.length > 0) {                        HashMap<String, Object> paramMap = (HashMap<String, Object>) objects[0];                        if (paramMap.get(name2) != null) {                            field2.setAccessible(true);                            field2.set(target, paramMap.get(name2));                        }                    }                }            }        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * @param target  目标类     * @param map  原类     */    public static void copyMapProperties(Object target, Map<String,Object> map) {        try {            Class clazz2 = target.getClass();            Field[] fields2 = clazz2.getDeclaredFields();            for (String key : map.keySet()) {                String name1 = key;                Object value =(Object) map.get(key);                for (Field field2 : fields2) {                    String name2 = field2.getName();                    if (name1.toUpperCase().equals(name2.toUpperCase())) {                        field2.setAccessible(true);                        if (value != null) {                            field2.set(target, value);                        }                    }                }            }        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 如果某个参数为固定值，则可以加以下对象objects，如：     * paramMap.put("userId", "aaaaaaaaaaa");     * paramMap.put("num", 777777777);固定值     *     * @param list    源list     * @param target  目标类CLASS     * @param objects 对象集合     * @return list     */    public static List<?> copyPropertiesList(List<?> list, Class target, Object... objects) {        List<Object> result = new ArrayList();        if (list != null) {            for (Object o : list) {                try {                    Object d = target.newInstance();                    copyProperties(d, o, objects);                    result.add(d);                } catch (Exception e) {                    e.printStackTrace();                }            }        }        return result;    }    /***     * 此方法为jdbc中调用指生成结果的方法,其他类型可以继续添加....     * *@author  chenhs     * update wmk     *     * @param clazz 类     * @param rs    结果集合     * @return object     * @date 2015/11/19     */    public static Object getBeanForRs(Class clazz, ResultSet rs) {        try {            Object target = clazz.newInstance();            Field[] fields = clazz.getDeclaredFields();            for (Field field : fields) {                String name = field.getName();                field.setAccessible(true);                Class type = field.getType();                try {                    if (type.equals(String.class)) {                        field.set(target, rs.getString(name));                    } else if (type.equals(Integer.class)) {                        field.set(target, rs.getInt(name));                    } else if (type.equals(Long.class)) {                        field.set(target, rs.getLong(name));                    } else if (type.equals(Float.class)) {                        field.set(target, rs.getFloat(name));                    } else if (type.equals(BigDecimal.class)) {                        field.set(target, rs.getBigDecimal(name));                    } else if(type.equals(UUID.class)){                        field.set(target, UUID.fromString(rs.getString(name)));                    } else if(type.equals(Date.class)){                        field.set(target,rs.getDate(name));                    }                } catch (Exception e) {                    System.out.println(e.getMessage());                }            }            return target;        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    /**     * 首字母转大写     *     * @param s 字符串     * @return stirng     * update wmk     */    private static String toUpcase(String s) {        return s.substring(0, 1).toUpperCase() + s.substring(1, s.length());    }}